<template>
    <div>
        <el-upload
            action="https://jsonplaceholder.typicode.com/posts/"
            list-type="picture-card"
            :on-preview="handlePictureCardPreview"
            :on-remove="handleRemove"
            multiple>
            <i class="el-icon-plus"></i>
        </el-upload>
        <el-dialog :visible.sync="dialogVisible">
        <img width="100%" :src="dialogImageUrl" alt="">
        </el-dialog>
    </div>
</template>

<script>
export default {
    props:['backUrl'],
    data() {
      return {
        dialogImageUrl: '',
        dialogVisible: false,
      };
    },
    mounted(){
      this.dialogImageUrl=this.backUrl
      console.log(this.dialogImageUrl);
    },
    methods: {
      handleRemove(file, fileList) {
        console.log(file, fileList);
      },
      handlePictureCardPreview(file) {
        this.dialogImageUrl = file.url;
        this.dialogVisible = true;
      }
    }
}
</script>

<style>

</style>